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drm/amd/display: Add monitor specific edid quirk

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commit 613a7956deb3b1ffa2810c6d4c90ee9c3d743dbb upstream.

Disable FAMS on a Samsung Odyssey G9 monitor. Experiments show that this
monitor does not work well under some use cases, and is likely
implementation specific bug on the monitor's firmware.

Cc: stable@vger.kernel.org
Reviewed-by: Rodrigo Siqueira <rodrigo.siqueira@amd.com>
Signed-off-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Aurabindo Pillai 2023-06-12 12:44:00 -04:00 committed by Greg Kroah-Hartman
parent 7ad40467fd
commit 8404d0e274
1 changed files with 26 additions and 0 deletions
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26
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_helpers.c
View File

@ -42,6 +42,30 @@
#include "dm_helpers.h"
#include "ddc_service_types.h"
static u32 edid_extract_panel_id(struct edid *edid)
{
return (u32)edid->mfg_id[0] << 24 |
(u32)edid->mfg_id[1] << 16 |
(u32)EDID_PRODUCT_ID(edid);
}
static void apply_edid_quirks(struct edid *edid, struct dc_edid_caps *edid_caps)
{
uint32_t panel_id = edid_extract_panel_id(edid);
switch (panel_id) {
/* Workaround for some monitors which does not work well with FAMS */
case drm_edid_encode_panel_id('S', 'A', 'M', 0x0E5E):
case drm_edid_encode_panel_id('S', 'A', 'M', 0x7053):
case drm_edid_encode_panel_id('S', 'A', 'M', 0x71AC):
DRM_DEBUG_DRIVER("Disabling FAMS on monitor with panel id %X\n", panel_id);
edid_caps->panel_patch.disable_fams = true;
break;
default:
return;
}
}
/* dm_helpers_parse_edid_caps
*
* Parse edid caps
@ -113,6 +137,8 @@ enum dc_edid_status dm_helpers_parse_edid_caps(
else
edid_caps->speaker_flags = DEFAULT_SPEAKER_LOCATION;
apply_edid_quirks(edid_buf, edid_caps);
kfree(sads);
kfree(sadb);